Had to use a substitue power supply cord for the old Mustek scanner, and now it's not doing well. I think because the cord I'm using only outputs 12V DC, and the original cord was 15V DC. Could be the lamp isn't getting enough juice to be bright enough to scan good or something. I just don't know. Or, it could be that it's because this scanner is about 25 years old...Once I can afford one, I'm getting a new Mustek A3 USB Pro scanner. They're about $170 bucks, and worth every penny.